Abstract: A preparation method for a collagen fiber, a collagen fiber, and a use. The method comprise the following steps: (1) spinning stock solution preparation: soaking a collagen material in a dissolving solution having a pH value of 3.5 to 5.5 for dissolution, and adjusting the pH value to 9.9 to 12.5, thereby forming a spinning stock solution; and (2) nascent fiber preparation: enabling the spinning stock solution to enter a coagulation bath having a pH value of 4.4 to 6.8 for coagulation and spinning, thereby forming nascent fibers. By means of multiple times of pH value adjustment, a collagen salting-out environment is formed, and the collagen fiber having spinnability is prepared by means of wet spinning.

Abstract: Provided is a method for querying questions. The method includes: acquiring input information of a user; acquiring intention information of the user based on the input information of the user; determining an answer generation rule; and generating, based on the input information and the intention information, a first answer in accordance with the answer generation rule, and providing the first answer to the user.

Abstract: A security architecture system includes a plurality of subsystems. The plurality of subsystems include a secure element subsystem. A first subsystem of the plurality of subsystems includes a trusted computing platform that has a trusted platform control module. The first subsystem is configured to, for a running object in one or more subsystems other than the first subsystem in the plurality of subsystems, use the trusted platform control module to perform security measurement on the running object based on a measurement strategy and a measurement benchmark value to obtain a measurement result. The measurement result is used to control a running state of the running object in one or more subsystems other than the first subsystem in the plurality of subsystems.

Abstract: A microbial protectant in a high-nutrient and high-activity chemical fertilizer-biological compound fertilizer and a preparation method thereof are related, belonging to the technical field of biological extracts. The microbial protectant mainly includes alginate oligosaccharide and tetrahydropyrimidine, with the other ingredients further including at least one of burdock oligosaccharide, chitosan oligosaccharide, amino acid, vegetable oil, fumaric acid, and citric acid. The microbial protectant can protect microorganisms from injury and death in extreme environments, such as a high-salt environment, has broad application prospects, and may be applied to the preparation of a high-activity microbial agent and the preparation of a high-nutrient chemical fertilizer-biological compound fertilizer.

Abstract: Techniques are described for determining failover to a redundant braking system. An example method can include determining a fault occurring at a first braking system or a second braking system of a primary braking system of an autonomous vehicle operating in an autonomous mode, and the autonomous vehicle using the first braking system. The method can further include switching from using the first braking system in the autonomous mode if the fault is determined at the first braking system. The method can further include transmitting to an alert system of the autonomous vehicle, a request to generate an alert for switching to a manual control mode of the autonomous vehicle based at least in part on determining the fault. The method can further include deactivating the autonomous mode of the autonomous vehicle upon determining that the autonomous vehicle is in the manual control mode.

Abstract: A high-nutrient and high-activity chemical fertilizer-biological compound fertilizer, and a preparation method and application thereof are provided. The high-nutrient and high-activity chemical fertilizer-biological compound fertilizer includes an inorganic chemical fertilizer and a microbial agent. The chemical fertilizer-biological compound fertilizer has nutrient contents of nitrogen, phosphorus, and potassium of greater than 40% and a viable number of microorganisms of 200 million cfu/g or more. The chemical fertilizer-biological compound fertilizer further includes a microbial protectant, and a mass ratio of the microbial protectant to the microbial agent is ?1.

Abstract: Provided are a compound represented by formula (I), a stereoisomer, pharmaceutically acceptable salt, solvate, and eutectic or deuterated compound thereof, or a pharmaceutical composition comprising same, and a use thereof as a PARP-1 inhibitor in the preparation of a medication for treating related diseases. Each group in formula (I) is as defined in the description.

Abstract: An inversion method of river course depth based on a mathematical model and remote sensing of water depth-water surface area includes the following steps: constructing the first mathematical model; calculating the relation function between the water flowing cross-section area, the triangle area at two sides and the water depth as well as the flow path, and substituting the relation functions into the first mathematical model to obtain the second mathematical model; transforming the second mathematical model into the mathematical model of water level-water surface area; solving the unknowns in the mathematical model, and substituting the unknowns into the second mathematical model to obtain the third mathematical model; and substituting the water surface area extracted by the remote sensing into the third mathematical model to obtain the water depth of the river course.

Abstract: A thermal runaway trigger method relates to the technical field of batteries. The thermal runaway trigger method includes: providing a battery cell and a heating member arranged in the battery cell; and heating the inside of the battery cell by the heating member, so as to cause a thermal runaway of the battery cell. The heating member is arranged inside the battery cell, and the heating member heats the inside of the battery cell to cause the thermal runaway of the battery cell, so that the inside of the battery cell can be heated to cause the thermal runaway of the battery cell in a relatively short time. Due to the reduced internal space of the battery cell, the range of diffusion of the heating member inside the battery cell is small, and the heat loss of the heating member is relatively small.

Abstract: Techniques are described for determining failover to a redundant braking system. An example method can include a system determining a fault occurring in a braking system of an autonomous vehicle (AV) operating in an autonomous mode, the braking system comprising a first braking system and a second braking system, the fault occurring in at least one of the first braking system and the second braking system, and the AV using the first braking system. The system can further determine whether to switch from using the first braking system based at least in part on determining the fault. The system can further transmit to an alert system of the AV, a request to generate an alert for manual control of the AV based at least in part on determining the fault. The system can further deactivate the autonomous mode of the AV based at least in part on determining the fault.

Abstract: A method of wireless communication includes configuring a first wireless communication device as a central and a second wireless communication device as a peripheral or vice versa. The first wireless communication device includes a number of controllers (transceivers). The method further includes forming an active link between the second wireless communication device and the first wireless communication device via a first controller. During each connection interval of a measurement period, the method further includes the steps of (i) transmitting only one data packet via the first controller for a central device or suspending transmission from the first controller for a peripheral, (ii) determining a first received signal quality from a data packet received via the first controller, (iii) receiving one data packet (central) or two data packets (peripheral) at a second controller, and (iv) determining a second received signal quality from the last received data packet at the second controller.

Abstract: The present disclosure provides an ultrafast Doppler ultrasound method for estimating a blood flow velocity through repetitive compounding of multi-angle plane waves. The method includes: controlling an ultrasonic transducer to cyclically transmit plane waves (101) according to a sequence of deflection angles of {0, ??, ?, ??}; receiving echo signals (102) of the plane waves reflected by an area to be scanned; searching for three consecutive frames of signals with deflection angles in a sequence of {0, ??, ?} and {?, ??, 0} in the echo signals to obtain multiple frame groups (103); compounding the three consecutive frames of signals of each frame group to obtain a compounded radio frequency (RF) signal (105); calculating a blood flow velocity (106) according to the compounded RF signal; and performing color coding on the blood flow velocity to generate a two-dimensional (2D) blood flow velocity image (107).

Abstract: Techniques are described for determining failover to a redundant braking system. An example method can include a system determining a fault occurring in a braking system of an autonomous vehicle (AV) operating in an autonomous mode, the braking system comprising a first braking system and a second braking system, the fault occurring in at least one of the first braking system and the second braking system, and the AV using the first braking system. The system can further determine whether to switch from using the first braking system based at least in part on determining the fault. The system can further transmit to an alert system of the AV, a request to generate an alert for manual control of the AV based at least in part on determining the fault. The system can further deactivate the autonomous mode of the AV based at least in part on determining the fault.

Abstract: A thermal runaway trigger method relates to the technical field of batteries. The thermal runaway trigger method includes: providing a battery cell and a heating member arranged in the battery cell; and heating the inside of the battery cell by the heating member, so as to cause a thermal runaway of the battery cell. The heating member is arranged inside the battery cell, and the heating member heats the inside of the battery cell to cause the thermal runaway of the battery cell, so that the inside of the battery cell can be heated to cause the thermal runaway of the battery cell in a relatively short time. Due to the reduced internal space of the battery cell, the range of diffusion of the heating member inside the battery cell is small, and the heat loss of the heating member is relatively small.

Abstract: The present disclosure discloses a motion control method and apparatus for a legged robot, a legged robot, a computer-readable storage medium, and a computer program product. The legged robot includes at least two foot-ends. The method includes: receiving a bound instruction for the legged robot in response to the foot-ends of the legged robot standing in unit regions that are independent from one another, the bound instruction being used for instructing the legged robot to bound to a target unit region from at least two unit regions in which the legged robot is currently located; and controlling the legged robot to bound to the target unit region in response to the bound instruction, a distance between any two foot-ends of the legged robot in the target unit region being less than a distance between two corresponding foot-ends before bounding.

Abstract: A depth-stage dependent and hyperparameter-adaptive lightweight CNN-based model, named Faster R-Stair, which relates to the field of concrete crack detection technology. The structure of the backbone in this model is depth-stage dependent, which includes suitable structures in different depths. The backbone is also hyperparameter-adaptive. The basic components in different depths of the backbone have variations according to the adjustment of some hyperparameters. The proposed model in this embodiment has the advantages of high convergence speed in training, fast detection speed and high accuracy when used in crack detection.

Abstract: The system and method facilitates Real-Time-Kinematic (RTK) GNSS with long baseline between a rover receiver and a base station receiver, even in the presence of scintillation or ionospheric disturbances that spatially fluctuate. Residual atmospheric errors can be estimated by a dual error model in a filter to promote efficient fixing or resolution of carrier phase ambiguities.